Coal-crusher.



No. 820,518. y' PATENTBD MAY l5, 1906. G. W. PERRY.

COAL ORUSHER.

APPLIoATIoN FILED APR. zo. 1905.

ATTORNEYS mnniw, s. annum ca.. mm-umocnmvzus, wAsnmaron. u c` UNITED STATES PATENT OFFICE. GEoEGE w. PERRY, or TUsoAEoEA, PENNSYLVANIA.

COAL-CRUSHER- Specification of Letters Patent.

' Patented May 15, 1906.

Application filed April 29. 1905. serial No. 258,016.

To all whom, t Netty concern:

Be it known that I, GEORGE W. PERRY, a citizen of the United States, and residing at Tuscarora, in the county of Schuylkill and State of Pennsylvania, have invented certaillv new and useful Improvements in Coal-Crushers, of which the following is a specification, such as will enable those skilled in the art to which it appertains to make and use the same.

This invention relates to coal-crushing devices or machines 5 and the object thereof is to provide an improvedapparatus of this class which is simple in construction and operation and involves the usual casing having two rollers mounted therein', one of which is larger than the other, said rollers being provided with coal-crushing teeth and being geared in connection so as to turn synchronously, thereby causing the teeth on the larger roller to travel faster than those on the smaller roller, the form and arrangement of the teeth, the comparative sizes of the rollers, and the method of turning the same being such as to cause a perfect crushing of the coal and prevent the clogging of the machine.

This invention is an improvement on that described and claimed in the United States Letters lPatent No. 778,372, granted to me December 27, 1904, and is fully disclosed in the following specification, of which the accompanying drawings form a part, in which the separate parts of my improvement are designated by suitable reference characters in each of the views, and in which- Figure 1 is a horizontal section of my improved coal-crushing machine, taken on the ine 1 1 of Fig. 2; Fig. 2, a section on the line 2 2 of Fig. 1, and Fig. 3 an end view looking in the direction of the arrow :cof Fig. 1.

In the practice of my invention I provide a suitable casing a, which is rectangular in form and provided in the bottom with an opening a2 and in the top thereof with a hopper-opening a3, and in the casing a are mounted two rollers b and c, one of which is larger than the other, the roller bbeing preferably about one-third larger than the roller c.

The rollers l) and c are so mounted that the tops of both of said rollers are in the same horizontal plane, and in practice these rollers are turned in the direction indicated by the arrows y in Fig. 2, and said rollers are provided, respectively, with longitudinal and parallel rows of teeth b2 and c2. The rows of teeth b2 and c2 on the rollers b and c are preferably arranged slightly diagonally of the surface of said rollers, the inclination of said lines of teeth being in opposite directions on the separate rollers, and the teeth on each roller are also arranged in transverse or circumferential rows, and the teeth of the transverse or circumferential rows of teeth on one roller pass between the transverse or circumferential rows of teeth on the other roller in the operation of the machine, as clearly shown in Fig. 1, and the teeth on lthe rollers b and c are also curved in the direction of the rotation of said rollers and are sharp-pointed, as clearly shown in the drawings, whereby said teeth are made hook-shaped in form. It will also be observed that the number of longitudinal rows of teeth of-each roller is the same, and the circumferentially-arranged rows of teeth are arranged alternately on said rollers, and by reason of this arrangement the teeth on the larger roller will pass between the teeth on the smaller roller at the point where the two rollers come the closest together in the rotation thereof.

The rollers b and c are geared in connection at one end by means of gear-wheels e, which are of the same size, and said rollers are thus compelled to turn synchronously or in the same time, and one of the rollers, preferably the roller b, is provided opposite the gearwheel e thereof with a drive-wheelf- It will be understood that coal is fed into the casing a between the rollers b and c through the hopper-opening a3 in the top of said casing, and as the coal is crushed it passes downwardly through the opening a2 through the bottom of said casing, and by means of the arrangement of the teeth on the rollers l) and c, as herein described, the crushing of the coal is made complete and the machine is prevented from clogging or the coal is prevented from packing between the rolln ers. My invention, however, is in no way limited to the form, construction, or arrangement of the casing a, and any suitably-constructed casing may be employed.

It will be understood that the distance between the teeth on the rollers b and c longitudinally and transversely of said rollers may be regulated as desired, and in this way the coal may be crushed or broken into any desired grade, and it will also be apparent that the entire machine may be made of any desired size or capacity.

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

l. A coal-crushing machine, comprising a casing and two parallel rollers mounted therein, one of which is larger than the other, said rollers being geared in connection so as to turn synchronously, and each of said rollers being provided with longitudinally-arranged parallel rows of teeth which are also arranged in circumferential and parallel rows, the circumferential and parallel rows of teeth on one roller coming between the circumferential and parallel rows of teeth on the other roller, and the longitudinally-arranged and parallel rows of teeth on one roller coming between the longitudinally-arranged and parallel rows of teeth on the other roller, substantially as shown and described.

2. A coal-crushing machine, comprising a casing and two parallel rollers mounted therein, one of which is larger than the other, said rollers being geared in connection so as to turn synchronously, and cach of said rollers being provided with longitudinally-arranged parallel rows of teeth which are also arranged in circumferential and parallel rows, the circumferential and parallel rows of teeth on one roller coming between the circumferential and parallel rows of teeth on the other roller, and the longitudinally-arranged and parallel rows of teeth on one roller coming between the longitudinally-arranged and parallel rows of teeth on the other roller, and said longitudinally-arranged and parallel rows of teeth on both of said rollers being also arranged spirally thereon the direction thereof being opposite on the separate rollers, substantially as shown and described.

3. A coal-crusher, comprising a casing having parallel rollers mounted therein, one of said rollers being larger than the other, and

the tops of said 'rollers bengn the saine horzontal plane, said rollers being each provided with parallel and longitudinally-arranged rows of teeth, said teeth being also arranged,v in .circumferential and parallel rows, said rollers being geared in connection so as to turn synchronously, and the longitudinallyarranged rows of teeth on one roller coming between the longitudinally-arranged rows of teeth on the other roller, and the circumferentially-arranged rows of teeth on one roller coming between the circumferentially-arranged rows of teeth on the other roller, substantially as shown and described.

4. A coal-crusher, comprising a casing having parallel rollers mounted therein, one oi' said rollers being larger than the other, and the tops of said rollers being in the same hori- Zontal plane, said rollers being each provided with parallel and longitudinally-arranged rows of teeth, said teeth being also arranged in circumferential and parallel rows, said rollers being geared in connection so as to turn synchronously, and the longitudinallyarranged rows of teeth on one roller coming between the longitudinally-arranged rows of teeth on the other roller, and the circumferentially-arranged rows of teeth on one roller coming between the circumferentially-arranged rows of teeth on the other roller, and the longitudinally-arranged rows oi' teeth on each roller being the same in number, substantially as shown and described.

ln'testimony that I claim the foregoing as my invention I have signed my name, in presence or' the subscribing witnesses, this 24thr day of April, 1905.

y GEORGE W. PERRY.

Witnesses:

Tiros. J. DEVLIN, WILLIAM TRAIHTE. 

